I've name changed for this, been on MN for many months, my problem is this;
DH and I are both 49,been married over 25 years, DH and DS play a sport and have been playing for years,
A couple of years back I discovered DH having what I believe was an emotional affair. He was keeping his phone in his pocket all the time but he forgot I knew his e mail password.
There were emails to a lady (whose son plays in the same team as DS/DH)
Lots of jokey things but some saying she was perfect and he was lovely, how they looked forward to next weekend etc etc, you get the picture.
I then looked at his phone one night and same sort of thing on there,
I was heartbroken, DH never pays me compliments, says I'm perfect or anything like that.
Anyway I told him I'd found things and he didn't deny it, thought it was funny that I was so upset and says she's a friend. He acknowledged that him saying she was perfect was abit over friendly 
Anyway, things moved on, I tried to not be jealous and have met the woman a few times, she seems ok and is married, but I even now feel uneasy about it,
So now the problem ( hope your still with me!)
DS has a new girlfriend and it is the woman's daughter 
She's a lovely girl but I can't get it all out of my head, we are all going out on Sunday (me,DS,DH,girlfriend)
DH says we must go and collect girl on our way, and drop her home.
We never took DS previous gf anywhere with us!
I've been crying as I want DS to be happy but I feel so uncomfortable about it,
Deep down I think DH has organised this day out to get in the woman's good books but then I think I'm paranoid!!
Sorry it's sooooo long 